Liquid sprayer or atomizer.



T. ANDREW,

LlaQUlD SPRAYER 0R ATOMIZER. APPLICATION FILED JULY 24.19l1.

1,294,373. Patented Feb.18,1919.

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0% v 1 9 AILORNEW T. ANDREW. LIQUID SPRAYER 0R ATOMIZER.

APPLICATION FILED J'ULY 24.1911.

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I 1,294,373.. Patented Feb. 18', 1919.

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Fig.5 BNVENTOR lid TOM ANDREW, 0F HEATON MODE, N'EAIR. STOGKPORT, ENGLAND.

LIQUID SPRAYEB OR ATOMIZER.

Specification of Letters Patent.

Patented Feb. 18, 19119.

Application filed July 24, 1917. Serial No. 182,589.

To all whom it may concern:

Be it known that I, Tom ANDREW, a subject of the King of Great Britain and Ireland, and resident of l Langford road, Heaton Moor, near Stockport, in the county of Chester, England, have invented certain new and useful Improvements Relating to Liquid Sprayers or Atomizers, of which the following is a specification.

This invention relates to spraying or atomizing arrangements in which a liquid and compressed air are employed, and has for its object to provide simple and efiicient means which shall prevent the delivery of liquid at the atomizers or sprayers if the air supply thereto is of insuiiicient pressure due to leakage, obstruction or other cause, to efi'ect the atomization satisfactorily.

My invention comprises essentially the combination with the air and liquid supply passages, of a liquid control valve normally closed but adapted to be opened by the air when the pressure of the latter exceeds a predetermined amount.

My invention further comprises the details of construction hereinafter described.

Referring to the two accompanying sheets of explanatory drawings Figure 1 shows the general arrangement of an atomizing plant having my improved control means applied thereto.

Figs. 2 and 3 are respectively sectional elevation and elevation of a control fitting constructed in one convenient form in accordance with my invention.

Figs. 4: and 5 are views similar to Figs. 2 and 3 but showing another form of control fitting.

The same reference letters in the different views indicate the same or similar parts.

Referring in the first place to Fig. 1, air under pressure for atomizing purposes is obtained from the air compressor a by way of the receiver 6, and cooler and oil separator c, the air pipe line for the installation being shown at d. The water supply is obtained from any convenient source by way of the pipe 6 which is provided with an air vessel f (forming an air cushion chamber), and a vessel 9 in which the water may be acted upon for filtering, disinfecting, deodorizing, fumiga-ting or other purposes. The water finally passes through the air cooler c to the pipe line it of the installation. In order to control the liquid supply, so that it is cut off when the air pressure falls below a pre 7 determined amount, I provide a control fitting ?I which may be of the form shown in Fi s. 2 and 3 or in Figs. 4 and 5.

Tn the Figs. 2 and 3 arrangement, the liquid enters the casing 71 by the port 7' and leaves by the port it, while the air connection is at m. The pressure of the air acts upon the piston n so as to tend to lift the valve 0 against the pressure of the adjustable spring 39 and the pressure of the liquid. The valve 0 may be so set that it closes when the air pressure is less than any predetermined amount.

In the arrangement shown in Figs. 4 and 5, I employ a piston-type valve 0 for controlling the liquid and provide a passage 9 for releasing the liquid entrapped above the piston and which tends to close the valve. This arrangement is suitable forfitting adjacent to each atomizer, but it may be employed in the same position as the control fitting 2' shown in Fig. 1. The air passes through the fitting by way of the passage m. Springs or weights may be employed for loading the piston, if desired.

With the aforesaid arrangements, should the air supply to the atomizer be obstructed I or should a leakage occur such as would reduce the air pressure at the atomizer to an amount insufiicient to give satisfactory atomization, then the liquid supply will be out oil and the damage which might be caused by the issue of unatomized liquid prevented. I may, if desired, utilize a control valve such as before described which opens and releases the liquid in the pipes beyond the main valve 2' (Fig. 1), when the air pressure falls below a predetermined amount. This arrangement provides an automatic drain for the said pipes.

The sprayer or atomizer may be of any' known or suitable type and I do not limit myself to any particular construction and arrangement of the same.

The rooms or compartments receiving the sprayed liquid may have separate liquid tanks (such as g, Fig. 1) therein so that independent treatment of the liquid to suit the conditions in each room may be effected if required.

The liquid may be pumped through the pipe line or may be under the ordinary pressure of the water mains.

I may modify the details of my control valve and the arrangement of the pipes and other parts to suit requirements. Suitable control and lay-pass valves are provided where required.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is 1. In atomizing or spraying apparatus in which a liquid is sprayed by compressed air,

the combination with the liquid and air,

pipes, of a valve on said liquid pipe and means whereby the said valve is operated by the pressure in the air pipe, as set forth.

2. in atomizers or spraying apparatus in resaeve open said valve when a predetermined air pressure is reached, as set forth.

3. In atomizers or spraying apparatus in which a liquid is sprayed by compressed air, the combination with the liquid and air pipes, of a valve trolling the liquid flow, a spring holding said valve on its seat, a piston attached to said liquid control valve acted upon by the air pressure in the air pipe so as to open said valve when a predetermined air pressure is reached, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

TQM ANDREW'.

Witnesses:

Anrzaun HUGHES, Elma lrl-oems.

on saidliquid pipe con-' 

